The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1978
Filed:
Mar. 30, 1976
Yastami Kito, Tokyo, JA;
Nippon Otis Elevator Company, Tokyo, JA;
Kabushiki Kaisha Meidensha, Tokyo, JA;
Abstract
A control apparatus for an elevator system in which a rotation speed of a drive motor for driving said elevator system in controlled by supplying a deviation signal obtained by comparing a speed signal of said drive motor including an induction motor with a driving pattern setting signal; said control apparatus comprising a time function generating circuit operated by means of retarding instruction signal supplied from the elevator and for generating a speed instruction output signal which decreases lineally to zero when a elevator cage approaches to a stop position in a distance of the elevator travelling, a correcting instruction circuit for supplying a correcting signal depending on an error signal of a drive motor or a speed instruction signal of said time function generating circuit, with respect to a reference speed signal, to said time function generating circuit.